Early development of Negro and white babies

Housing and mothering: their effects upon the developmental levels of 3-year-old children

The development of 200 3-year-old children was measured, using Gesell parameters of development. The levels of development were matched against the adequacy, or inadequacy, of maternal care and housing, the scales for which were derived from a questionnaire completed by the children's mothers. Housing was not found to affect the children's developmental levels, while the adequacy of maternal care was highly significantly related to satisfactory child development.

Peripheral nerve maturation in English, West Indian and Turkish newborn infants

The ulnar and posterior tibial conduction velocities were measured in a group of normal full-term English, West Indian and Turkish infants. The English infants had a faster mean ulnar nerve conduction velocity than the West Indian and Turkish infants, but when the sex of the infants was taken into account only the male West Indian infant was found to have slower mean velocities. By three months of age the velocities were similar between the West Indian and English infants. This study emphasises the importance of taking account of the sex of infants in any developmental study.